Oxybasis glauca
Oak-leaved Goosefoot
Papaver cambricum
Welsh Poppy
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Persicaria amphibia
Amphibious Bistort
Persicaria lapathifolia
Pale Persicaria
Petasites hybridus
Butterbur
Petasites pyrenaicus
Winter Heliotrope
Petasites spurius
Petrorhagia prolifera
Proliferous Pink
Petrosedum forsterianum
Rock Stonecrop
Phacelia tanacetifolia
Phacelia
Phalaris arundinacea
Reed Canary-grass
Phegopteris connectilis
Beech Fern
Phelipanche purpurea
Yarrow Broomrape
Phleum pratense
Timothy
Pieris formosa
Pilosella aurantiaca
Fox-and-cubs
Pilularia globulifera
Pillwort
Pinguicula vulgaris
Common Butterwort
Plantago coronopus
Buck's-horn Plantain
Platanthera chlorantha
Greater Butterfly-orchid
Polemonium pauciflorum
Fewflower Jacob's-ladder
Polygala calcarea
Chalk Milkwort